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Discover LudwigSuggestions(5)
The phrase "a number of difficult" is not correct as it is incomplete and lacks a noun to follow "difficult." You can use it when referring to multiple challenging items or tasks, but it needs to be completed with a noun.
Example: "There are a number of difficult problems we need to solve."
Alternatives: "several challenging" or "many tough".
Exact(60)
The book takes on a number of difficult technical challenges.
My attitude brings me a number of difficult cases.
He cited "a number of difficult issues" that have to be resolved.
The new Congress and president have a number of difficult tasks ahead.
"A number of difficult issues remain to be resolved before they can report to me".
Understanding individuals' needs and values allowed Bock's team to successfully address a number of difficult situations.
This book covers a number of difficult chapters in your life.
The numerical scheme is verified on a number of difficult benchmark problems.
This forces project management to make a number of difficult or costly decisions.
But Nasdaq's potential bid for NYSE Euronext poses a number of difficult hurdles.
Loria, in fact, has a number of difficult decisions to make if he is to keep the club relatively intact.
More suggestions(17)
a number of sticky
a number of knotty
a number of awkward
a number of harsh
a multitude of difficult
a number of tricky
a number of tough
a number of problematic
a number of troublesome
a number of delicate
a number of complex
a number of challenging
a number of thorny
a number of online
a matter of difficult
a number of good
a month of difficult
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com